<!DOCTYPE html>
<html>
    <body>
        <script>
            function person(firstname, lastname, age, eyecolor) {
                this.firstname = firstname;
                this.lastname = lastname;
                this.age = age;
                this.eyecolor = eyecolor;
                this.changeName = changeName;
                function changeName(name) {
                    this.lastname = name;
                }
            }
            myMother = new person("Steve", "Jobs", 56, "green");
            myMother.changeName("Ballmer");
            document.write(myMother.lastname);
        </script>
    </body>
</html>
